Guns of generally similar construction and performance but built by different manufacturers.
Model 1918 was in single mounts, Model 1918/19 was the same weapon but in twin mountings. Models 1924 and 1926 were very similar and were in twin mountings.
This or a similar weapon was used on the Brazilian submarine Humaita, which was built during 1927-28 by Odero-Terni, Spezia.
|Designation||120 mm/45 (4.7") Models 1918, 1924 and 1926|
|Ship Class Used On||Leone, Sauro, Turbine and Sella classes|
|Manufacturer||Schneider-Canet-Armstrong: Models 1918 and 1918/19
Vickers-Terni: Model 1924
OTO: Model 1926
|Date of Design||1918 (1924 and 1926)|
|Date In Service||1919|
|Gun Weight||9,600 lbs. (4,354 kg)|
|Gun Length oa||196.3 in (4.985 m)|
|Bore Length||212.6 in (5.400 m)|
|Rate Of Fire||7 rounds per minute|
|Type||Bag (may have been separate)|
|Projectile Types and Weights||HE: 48.5 lbs. (22 kg)
AP: 51.0 lbs. (23.15 kg)
|Propellant Charge||16.75 lbs. (7.6 kg)|
|Muzzle Velocity||Model 1918: 2,460 fps (750 mps)
Others: 2,789 fps (850 mps)
|Approximate Barrel Life||N/A|
|Ammunition stowage per gun||N/A|
|33 degrees||16,950 yards (15,500 m)|
AMCs, troop transports: M1918
Sella (1): M1918
Twin: 16.6 tons (16.9 mt)
|Elevation||Model 1918: -10 / +30 degrees
Model 1918/19: -10 / +32 degrees
Model 1924 and 1926: -10 / +33 degrees
|Elevation Rate||Manual operation, only|
|Train||about +150 / -150 degrees|
|Train Rate||Manual operation, only|
- ^The Sella class originally had a single gun on the bow, but this was replaced in 1929 by a M1926 twin mounting. It would appear that the stern mount was also changed to a M1926 at this time or it could have always been a M1926 twin mount.
- The twin mountings had the guns only 22.8 in (58 cm) apart and suffered from dispersion problems as a result.
"Naval Weapons of World War Two" by John Campbell
"Italian Warships of World War II" by Aldo Fraccaroli
"Destroyers of World War Two" by M.J. Whitley
07 January 2008 - Benchmark
17 January 2017 - Converted to HTML 5 format and minor changes
03 January 2022 - Re-did photograph of Nazario Sauro, minor formatting changes